|On distributed wargaming in operational C2-systems using object-oriented programming languages - Huber, Reiner K.;Wozencraft, John M.|
Title from cover
Keywords: OBJECT ORIENTED PROGRAMMING
|Course 04: Basic Object Oriented Programming (ArsDigita University)|
The concepts of the Object-oriented paradigm using Java. The basic principles of software engineering are emphasized. We study how to design and think in an object oriented fashion. As a final project, students work in groups to develop a Gnutella distributed music-sharing client. Text: Core Java 2, Volume I: Fundamentals and Volume II: Advanced Features,Hortsmann and Cornell. Requirements: One exam, two problem sets, one project.
Keywords: object oriented programming
Downloads: 140,462 (3 reviews)
|Building an object model of a legacy simulation - Larimer, Larry R|
Thesis advisor, Arnold Buss
Keywords: DISTRIBUTED INTERACTIVE SIMULATION; OBJECT ORIENTED PROGRAMMING
|Introspection-An Optimal Technique for Dynamic Analysis of Object Oriented Programs|
In last few years, Dynamic metrics was hot area of research in software engineering. A number of studies have explored how dynamic analysis can measure the quality of Object Oriented Software. Most of the studies utilized dynamic coupling, cohesion and complexity metrics to assess the quality of software. Unfortunately, the use of such metrics has not been practically validated. They were just implemented on small programs and their use for practical applications has so far not been thoroughly i...
Keywords: Dynamic Metrics; Object Oriented Programming; Dynamic Analysis; Software Quality
|Approach for Input Uncertainty Propagation and Robust Design in CFD Using Sensitivity Derivatives - Putko, Michele M.|
An implementation of the approximate statistical moment method for uncertainty propagation and robust optimization for quasi 3-D Euler CFD code is presented. Given uncertainties in statistically independent, random, normally distributed input variables, first- and second-order statistical moment procedures are performed to approximate the uncertainty in the CFD output. Efficient calculation of both first- and second-order sensitivity derivatives is required...
Keywords: DATA BASES; INTERNETS; OBJECT-ORIENTED PROGRAMMING; PERSONNEL; LAW (JURISPRUDENCE)
|Astrometry of Single-Chord Occultations: Application to the 1993 Triton Event - Olkin, Catherine B.|
This paper outlines a method for reducing astrometric data to derive the closest approach time and distance to the center of an occultation shadow for a single observer. The method applies to CCD frames, strip scans or photographic plates and uses a set of field stars of unknown positions to define a common coordinate system for all frames. The motion of the occulting body is used to establish the transformation between this common coordinate system and the celestial coordinate system of the bod...
Keywords: OBJECT-ORIENTED PROGRAMMING; TAXONOMY; SOFTWARE ENGINEERING; COMPUTER PROGRAMMING; AMBIGUITY; ORGANISMS
|A Linux Workstation for High Performance Graphics - Geist, Robert|
The primary goal of this effort was to provide a low-cost method of obtaining high-performance 3-D graphics using an industry standard library (OpenGL) on PC class computers. Previously, users interested in doing substantial visualization or graphical manipulation were constrained to using specialized, custom hardware most often found in computers from Silicon Graphics (SGI). We provided an alternative to expensive SGI hardware by taking advantage of third-party, 3-D graphics accelerators that h...
Keywords: AIRCRAFT SAFETY; FLIGHT SIMULATION; MANUALS; OBJECT-ORIENTED PROGRAMMING; ALGORITHMS
|Conceptual modeling : an object-oriented approach to requirements specification - Duggins, Sheryl L.|
Keywords: Computer software; Computer programs; Object-oriented programming (Computer science)
|Lynda Object Oriented Programming With PHP Omati.net|
Lynda - Object-Oriented Programming with PHP omati.net
Keywords: Lynda - Object-Oriented Programming with PHP omati.net
|First Estimates of the Radiative Forcing of Aerosols Generated from Biomass Burning using Satellite Data - Chistopher, Sundar A.|
Collocated measurements from the Advanced Very High Resolution Radiometer (AVHRR) and the Earth Radiation Budget Experiment (ERBE) scanner are used to examine the radiative forcing of atmospheric aerosols generated from biomass burning for 13 images in South America. Using the AVHRR, Local Area Coverage (LAC) data, a new technique based on a combination of spectral and textural measures is developed for detecting these aerosols...
Keywords: PROGRAMMING LANGUAGES; PRODUCTIVITY; OBJECT-ORIENTED PROGRAMMING; EXPLOSIONS; COMPUTATION; COMPUTER PROGRAMMING
|Holographic Optical Elements as Scanning Lidar Telescopes - Schwemmer, Geary K.|
We have developed and investigated the use of holographic optical elements (HOEs) and holographic transmission gratings for scanning lidar telescopes. For example, rotating a flat HOE in its own plane with the focal spot on the rotation axis makes a very simple and compact conical scanning telescope. We developed and tested transmission and reflection HOEs for use at the first three harmonic wavelengths of Nd:YAG lasers...
Keywords: OBJECT-ORIENTED PROGRAMMING; SOFTWARE ENGINEERING; PROGRAMMING LANGUAGES; MODULARITY; COMPUTER PROGRAMS
|MIT 6.01SC Introduction to Electrical Engineering and Computer Science I, Spring 2011|
Instructor: Dennis Freeman, Kendra Pugh This course provides an integrated introduction to electrical engineering and computer science, including modern software engineering, linear systems analysis, electronic circuits, and decision-making. The lecture videos provide an overview of each topic, while the recitation videos are designed to review key concepts. View the complete course: http://ocw.mit.edu/6-01SCS11
Keywords: object-oriented programming; signals and systems; circuits; probability; search
|Decadal Changes in Global Ocean Chlorophyll - Gregg, Watson W.|
The global ocean chlorophyll archive produced by the Coastal Zone Color Scanner (CZCS) was revised using compatible algorithms with the Sea-viewing Wide Field-of-view Sensor (SeaWIFS), and both were blended with in situ data. This methodology permitted a quantitative comparison of decadal changes in global ocean chlorophyll from the CZCS (1979-1986) and SeaWiFS (Sep. 1997-Dec. 2000) records. Global seasonal means of ocean chlorophyll decreased over the two observational segments, by 8% in winter...
Keywords: OBJECT-ORIENTED PROGRAMMING; POTENTIAL FIELDS; C (PROGRAMMING LANGUAGE); COMPUTATIONAL GRIDS; EDGES; APEXES
|Modelling and simulation of Space Station Freedom berthing dynamics and control - Cooper, Paul A.|
A large-angle, flexible, multibody, dynamic modeling capability has been developed to help validate numerical simulations of the dynamic motion and control forces which occur during berthing of Space Station Freedom to the Shuttle Orbiter in the early assembly flights. This paper outlines the dynamics and control of the station, the attached Shuttle Remote Manipulator System, and the orbiter. The simulation tool developed for the analysis is described and the results of two simulations are prese...
Keywords: CONTROLLERS; MANUFACTURING; OBJECT-ORIENTED PROGRAMMING; ROBOTICS; SOFTWARE ENGINEERING; FAULT TOLERANCE; REAL TIME OPERATION
|Demodulation System for Fiber Optic Bragg Grating Dynamic Pressure Sensing - Lekki, John D.|
Fiber optic Bragg gratings have been used for years to measure quasi-static phenomena. In aircraft engine applications there is a need to measure dynamic signals such as variable pressures. In order to monitor these pressures a detection system with broad dynamic range is needed. This paper describes an interferometric demodulator that was developed and optimized for this particular application. The signal to noise ratio was maximized through temporal coherence analysis...
Keywords: OBJECT-ORIENTED PROGRAMMING; SYSTEMS ENGINEERING; NETWORK SYNTHESIS; COMPUTER COMPONENTS; ARCHITECTURE (COMPUTERS)
|Constraints on Variability of Brightness and Surface Magnetism on Time Scales of Decades to Centuries in the Sun and Sun-Like Stars: A Source of Potential Terrestrial Climate Variability - Baliunas, Sallie L|
These four points summarize our work to date. (1) Conciliation of solar and stellar photometric variability. Previous research by us and colleagues suggested that the Sun might at present be showing unusually low photometric variability compared to other sun-like stars. Those early results would question the suitability of the technique of using sun-like stars as proxies for solar irradiance change on time scales of decades to centuries...
Keywords: SIMULATION; PROPULSION SYSTEM CONFIGURATIONS; AIR BREATHING ENGINES; COST EFFECTIVENESS; SPACE TRANSPORTATION SYSTEM; OBJECT-ORIENTED PROGRAMMING
|STS-54 Space Shuttle mission report - Fricke, Robert W., Jr|
The STS-54 Space Shuttle Program Mission Report is a summary of the Orbiter, External Tank (ET), Solid Rocket Booster/Redesigned Solid Rocket Motor (SRB/RSRM), and the Space Shuttle Main Engine (SSME) subsystems performance during this fifty-third flight of the Space Shuttle Program, and the third flight of the Orbiter vehicle Endeavour (OV-105). In addition to the Orbiter, the flight vehicle consisted of an ET, which was designated ET-51; three SSME's, which were serial numbers 2019, 2033, and ...
Keywords: COMPUTER PROGRAMMING; OBJECT-ORIENTED PROGRAMMING; SOFTWARE ENGINEERING; AERODYNAMICS; PROGRAMMING ENVIRONMENTS; SOFTWARE REUSE
|Towards a Comprehensive Computational Simulation System for Turbomachinery - Shih, Ming-Hsi|
The objective of this work is to develop algorithms associated with a comprehensive computational simulation system for turbomachinery flow fields. This development is accomplished in a modular fashion. These modules includes grid generation, visualization, network, simulation, toolbox, and flow modules. An interactive grid generation module is customized to facilitate the grid generation process associated with complicated turbomachinery configurations...
Keywords: OBJECT-ORIENTED PROGRAMMING; LIBRARIES; COMPUTERIZED SIMULATION; TASKS; INFERENCE; INDUSTRIES; HYPOTHESES; FRAGMENTS; ABSTRACTS
|PLG : a model for high resolution, three-dimensional, object-oriented computer graphics on personal computers - Krell, Mitchell|
Keywords: Computer graphics; Computer graphics; Three-dimensional display systems; Object-oriented programming (Computer science)
|An object-oriented design methodology - de Paula, Everton G.;Nelson, Michael L.|
Title from cover
Keywords: OBJECT-ORIENTED DESIGN; OBJECT-ORIENTED PROGRAMMING; LOW COST COMBAT DIRECTION SYSTEM; MILITARY OPERATIONS
|Accelerated Testing Methodology Developed for Determining the Slow Crack Growth of Advanced Ceramics - Choi, Sung R.|
Constant stress-rate (''dynamic fatigue'') testing has been used for several decades to characterize the slow crack growth behavior of glass and structural ceramics at both ambient and elevated temperatures. The advantage of such testing over other methods lies in its simplicity: strengths are measured in a routine manner at four or more stress rates by applying a constant displacement or loading rate...
Keywords: COMPUTERIZED SIMULATION; COMPUTATIONAL FLUID DYNAMICS; DISTRIBUTED PROCESSING; OBJECT-ORIENTED PROGRAMMING; THERMAL ANALYSIS; VARIABLE CYCLE ENGINES; STRUCTURAL ANALYSIS; PROPULSION; ENGINE PARTS
|Planning: Management of predictability and uncertainty and keeping abreast of developments - Bastien-Thiry, Christophe|
The purpose of this study is to propose method to set up and control of a space mission plan such as that of the HERMES spaceplane. The interest of this subject, other than its complexity, is due to the need to manage imprecision and uncertainty during a mission, as well as changes in between missions. Under these conditions, the set up and control of a flight plan require certain special attention and this has led us to define a certain number of qualities: mastery of complexity in order to res...
Keywords: DATA PROCESSING; DATA REDUCTION; FLIGHT OPERATIONS; OBJECT-ORIENTED PROGRAMMING; TECHNOLOGY TRANSFER; APPLICATIONS PROGRAMS (COMPUTERS); COST REDUCTION; DATA SYSTEMS; SOFTWARE REUSE
|Fast Computation of the Inverse CMH Model - Patel, Umesh D.|
A fast computational method based on differential equation approach for inverse DOK model has been extended for the inverse CMH model. Also, a cobweb technique for calculating the inverse CMH model is also presented. The two techniques are differed from the point of view of flexibility and computation time.
Keywords: OBJECT-ORIENTED PROGRAMMING; COMPUTERIZED SIMULATION; FLIGHT SIMULATION; COMPUTER TECHNIQUES; MULTIPROCESSING (COMPUTERS); C (PROGRAMMING LANGUAGE); SCHEDULING; REAL TIME OPERATION; COMPUTER PROGRAMS
|Modal Acoustic Emission of Damage Accumulation in Woven SiC/SiC at Elevated Temperatures - Morscher, G. N|
Ceramic matrix composites exhibit significant nonlinear stress-strain behavior that makes them attractive as potential materials for many high temperature applications. The mechanisms for this nonlinear stress-strain behavior are all associated with various types of damage in the composites, e.g. transverse matrix cracks and individual fiber failures. Modal acoustic emission has been employed to aid in discerning the damage accumulation that occurs during elevated temperature tensile stress-rupt...
Keywords: COMPUTER PROGRAMMING; SOFTWARE ENGINEERING; SOFTWARE REUSE; COMPUTER PROGRAMS; PRODUCTIVITY; RELIABILITY; OBJECT-ORIENTED PROGRAMMING; SOFTWARE DEVELOPMENT TOOLS; SOFTWARE RELIABILITY
|Optimization of the heating surface shape in the contact melting problem - Fomin, Sergei A.|
The theoretical analysis of contact melting by the migrating heat source with an arbitrary shaped isothermal heating surface is presented. After the substantiated simplification, the governing equations are transformed to the convenient equations for engineering calculations relationships. Analytical solutions are used for numerical prediction of optimal shape of the heating surface. The problem is investigated for the constant and for temperature dependent physical properties of the melt.
Keywords: APPLICATIONS PROGRAMS (COMPUTERS); C (PROGRAMMING LANGUAGE); C (PROGRAMMING LANGUAGE); OBJECT-ORIENTED PROGRAMMING; FLEXIBILITY; MAINTAINABILITY; RELIABILITY ENGINEERING; SPACE STATION FREEDOM
|The LHC magnet system and its status of development - Bona, Maurizio|
CERN is preparing for the construction of a new high energy accelerator/collider, the Large Hadron Collider (LHC). This new facility will mainly consist of two superconducting magnetic beam channels, 27 km long, to be installed in the existing LEP tunnel. The magnetic system comprises about 1200 twin-aperture dipoles, 13.145 m long, with an operational field of 8.65 T, about 600 quadrupoles, 3 m long, and a very large number of other superconducting magnetic components...
Keywords: APPLICATIONS PROGRAMS (COMPUTERS); COMPUTERIZED SIMULATION; GAS TURBINE ENGINES; PROPULSION SYSTEM PERFORMANCE; ENGINE TESTS; OBJECT-ORIENTED PROGRAMMING; PROTOTYPES
|Second-order reconstruction of the inflationary potential - Liddle, Andrew R.|
To first order in the deviation from scale invariance the inflationary potential and its first two derivatives can be expressed in terms of the spectral indices of the scalar and tensor perturbations, n and n(sub T), and their contributions to the variance of the quadrupole CBR temperature anisotropy, S and T. In addition, there is a 'consistency relation' between these quantities: n(sub T) = (-1/ 7)(T/S)...
Keywords: COGNITION; HUMAN BEHAVIOR; OBJECT-ORIENTED PROGRAMMING; SEMANTICS; COMPUTER PROGRAMMING; EDUCATION; EXPERIENCE; MATHEMATICAL LOGIC; PHILOSOPHY; SOFTWARE DEVELOPMENT TOOLS; SOFTWARE ENGINEERING; CHILDREN
|The Roles of Aerosols in Stratospheric Ozone Chemistry - Strawa, Anthony W.|
A main objective of the study was to determine the amount of aerosol surface area, particularly that of black carbon aerosol (BCA), available for reaction with stratospheric constituents and to assess, if possible, the importance of these reactions. The AWI collect aerosol and BCA particles on thin palladium wires that are exposed to the ambient air in a controlled manner. The samples are returned to the laboratory for subsequent analysis...
Keywords: AIR TRAFFIC CONTROL; AIRPORTS; RUNWAYS; SCHEDULING; TERMINAL GUIDANCE; FLIGHT MANAGEMENT SYSTEMS; OBJECT-ORIENTED PROGRAMMING; AIRCRAFT APPROACH SPACING; SYSTEMS ENGINEERING
|A Design Process for the Acoustical System of an Enclosed Space Colony - Hawke, Joann|
Sounds of Silence. Using a general systems approach, factors and components of the acoustical design process for an isolated, confined space community in a torus space enclosure are considered. These components include the following: organizational structure and its effect on alternatives; problem definition and limits; criteria and priorities; methods of data gathering; modelling and measurement of the whole system and its components; decision methods; and design scenario of the acoustics of th...
Keywords: GALERKIN METHOD; SCATTERING; LINEARIZATION; UNSTRUCTURED GRIDS (MATHEMATICS); TIME DEPENDENCE; SIMULATION; EULER EQUATIONS OF MOTION; OBJECT-ORIENTED PROGRAMMING; ROBUSTNESS (MATHEMATICS); AEROACOUSTICS
|On supersonic-inlet boundary-layer bleed flow - Harloff, Gary J.|
Boundary-layer bleed in supersonic inlets is typically used to avoid separation from adverse shock-wave/boundary-layer interactions and subsequent total pressure losses in the subsonic diffuser and to improve normal shock stability. Methodologies used to determine bleed requirements are reviewed. Empirical sonic flow coefficients are currently used to determine the bleed hole pattern. These coefficients depend on local Mach number, pressure ratio, hole geometry, etc...
Keywords: COMPUTER GRAPHICS; CONTROL SIMULATION; ENGINE CONTROL; GRAPHICAL USER INTERFACE; REUSABLE ROCKET ENGINES; COMPUTERIZED SIMULATION; DISPLAY DEVICES; OBJECT-ORIENTED PROGRAMMING
|Development of Software to Model AXAF-I Image Quality - Geary, Joseph|
This report describes work conducted on Delivery Order 181 between October 1996 through June 1997. During this period software was written to: compute axial PSD's from RDOS AXAF-I mirror surface maps; plot axial surface errors and compute PSD's from HDOS ''Big 8'' axial scans; plot PSD's from FITS format PSD files; plot band-limited RMS vs axial and azimuthal position for multiple PSD files; combine and organize PSD's from multiple mirror surface measurements formatted as input to GRAZTRACE; mod...
Keywords: OBJECT-ORIENTED PROGRAMMING; DATA STRUCTURES; DELTAS; DATA BASES; SOFTWARE ENGINEERING; SOFTWARE DEVELOPMENT TOOLS; DATA PROCESSING; PROGRAMMING LANGUAGES; ALGEBRA; SOFTWARE RELIABILITY
|Promoting Real-Time Science in the Classroom using Wireless PDA Technology - Matusow, David|
The year is 2004, NASA has landed and deployed a fleet of rovers on the surface of Mars to continue the exploration of that planet and prepare the way for human visitors. Middle school students at Milton Elementary have been following the mission through the media and Internet as part of Mr. Johnson's Earth and space sciences class. The kids have been working in teams to track the rovers as they move across the surface of Mars on a scale model of the landing site they built from sand and rocks u...
Keywords: DATA PROCESSING; COMPUTER SYSTEMS PROGRAMS; PROGRAMMING ENVIRONMENTS; PROGRAMMING LANGUAGES; AUTOMATION; JAVA (PROGRAMMING LANGUAGE); OBJECT-ORIENTED PROGRAMMING; DATA MANAGEMENT; SOFTWARE ENGINEERING
|High Resolution X-ray Imaging - Cash, Webste|
NAG5-5020 covered a period of 7.5 years during which a great deal of progress was made in x-ray optical techniques under this grant. We survived peer review numerous times during the effort to keep the grant going. In 1994, when the grant started we were actively pursuing the application of spherical mirrors to improving x-ray telescopes. We had found that x-ray detectors were becoming rapidly more sophisticated and affordable, but that x-ray telescopes were only being improved through the inten...
Keywords: DATA MANAGEMENT; INTEGRATED LIBRARY SYSTEMS; SURVEYS; OBJECT-ORIENTED PROGRAMMING; TECHNOLOGIES; ELECTRONIC COMMERCE; ARCHITECTURE (COMPUTERS); PROTOCOL (COMPUTERS); CODING
|Kravchuk functions for the finite oscillator approximation - Atakishiyev, Natig M.|
Kravchuk orthogonal functions - Kravchuk polynomials multiplied by the square root of the weight function - simplify the inversion algorithm for the analysis of discrete, finite signals in harmonic oscillator components. They can be regarded as the best approximation set. As the number of sampling points increases, the Kravchuk expansion becomes the standard oscillator expansion.
Keywords: APPLICATIONS PROGRAMS (COMPUTERS); PROTOTYPES; C (PROGRAMMING LANGUAGE); COMPUTER SYSTEMS DESIGN; METHODOLOGY; NAVIGATION; OBJECT-ORIENTED PROGRAMMING; AERODYNAMICS; ARCHITECTURE (COMPUTERS); BINARY CODES
|Ensemble Diffraction Measurements of Spray Combustion in a Novel Vitiated Coflow Turbulent Jet Flame Burner - Cabra, R.|
An experimental investigation is presented of a novel vitiated coflow spray flame burner. The vitiated coflow emulates the recirculation region of most combustors, such as gas turbines or furnaces; additionally, since the vitiated gases are coflowing, the burner allows exploration of the chemistry of recirculation without the corresponding fluid mechanics of recirculation. As such, this burner allows for chemical kinetic model development without obscurations caused by fluid mechanics...
Keywords: INFORMATION MANAGEMENT; INFORMATION TRANSFER; INFORMATION SYSTEMS; WORLD WIDE WEB; TRANSFER OF TRAINING; OBJECT-ORIENTED PROGRAMMING; SELECTIVE DISSEMINATION OF INFORMATION; COMPUTER INFORMATION SECURITY; ACCESS CONTROL
|A descriptive model for determining optimal human performance in systems - NON|
A study carried out by Serendipity Associates is described. The purpose was to summarize the objectives of the study as a whole, to describe the method employed to carry out the study, and to present recommendations for further work. Research reports presented include: (1) a simple model of a man-machine development cycle; (2) a simple calculus for discrete systems; (3) system development activities concerned with putting man in an aerospace system; (4) development of man-machine system: some co...
Keywords: ADA (PROGRAMMING LANGUAGE); COMPUTERIZED SIMULATION; HEURISTIC METHODS; COMPUTER PROGRAMS; CONTROL SIMULATION; FORTRAN; GAMMA RAY OBSERVATORY; OBJECT-ORIENTED PROGRAMMING; SATELLITE ATTITUDE CONTROL; SOFTWARE ENGINEERING; SOFTWARE REUSE
|New Type of the Interface Evolution in the Richtmyer-Meshkov Instability - Abarzhi, S. I.|
We performed systematic theoretical and numerical studies of the nonlinear large-scale coherent dynamics in the Richtmyer-Meshkov instability for fluids with contrast densities. Our simulations modeled the interface dynamics for compressible and viscous uids. For a two-fluid system we observed that in the nonlinear regime of the instability the bubble velocity decays and its surface attens, and the attening is accompanied by slight oscillations...
Keywords: INFORMATION SYSTEMS; AIR PURIFICATION; BIOMASS; FOOD PROCESSING; LIFE SUPPORT SYSTEMS; ON-LINE SYSTEMS; TECHNOLOGY UTILIZATION; SOLID WASTES; RESEARCH AND DEVELOPMENT; RELATIONAL DATA BASES; OBJECT-ORIENTED PROGRAMMING; PROTOCOL (COMPUTERS)
|Theoretical Studies of Important Processes in Planetary and Comet Atmospheres - Guberman, Steven L|
Using theoretical quantum chemical calculations, I have successfully described the dissociative recombination (DR) of O2() leading to the excited S-1 state of atomic oxygen, the upper state of the well known green line emission. The process is described by O2() e(-) yields O(S-1)) O(D-1) (1) where e(-) is an electron and the product oxygen atoms are both excited. This process is important in the atmospheres of Venus, Mars and Earth...
Keywords: TELECOMMUNICATION; ARCHITECTURE (COMPUTERS); C (PROGRAMMING LANGUAGE); DESIGN ANALYSIS; COMPUTERIZED SIMULATION; COMMUNICATION NETWORKS; GRAPHICAL USER INTERFACE; SCHEDULING; ALGORITHMS; OBJECT-ORIENTED PROGRAMMING; JAVA (PROGRAMMING LANGUAGE)
|Support of the Laboratory for Terrestrial Physics for Dynamics of the Solid Earth (DOSE) - Vandenberg, N. R|
This final report summarizes the accomplishments during the contract period. Under the contract Nepal, Inc. provided support to the VLBI group at NASA's Goddard Space Flight Center. The contract covered a period of approximately eight years during high geodetic and astrometric VLBI evolved through several major changes. This report is divided into five sections that correspond to major task areas in the contract: A) Coordination rid Scheduling, B) Field System, CN Station Support, D) Analysis an...
Keywords: VIRTUAL REALITY; COMPUTATIONAL FLUID DYNAMICS; FLOW VISUALIZATION; HUMAN-COMPUTER INTERFACE; WIND TUNNELS; SYSTEMS SIMULATION; USER REQUIREMENTS; OBJECT-ORIENTED PROGRAMMING; SOFTWARE ENGINEERING; C (PROGRAMMING LANGUAGE)
|Probing the Martian Subsurface with Synthetic Aperture Radar - Campbell, B. A.|
Many regions of the martian surface are covered by fine-grained materials emplaced by volcanic, fluvial, or aeolian processes. These mantling deposits likely hide ancient channel systems (particularly at smaller scale lengths) and volcanic, impact, glacial, or shoreline features. Synthetic aperture radar (SAR) offers the capability to probe meters below the surface, with imaging resolution in the 10 s of m range, to reveal the buried terrain and enhance our understanding of Mars geologic and cli...
Keywords: INFORMATION SYSTEMS; CONTROL SYSTEMS DESIGN; LIFE SUPPORT SYSTEMS; ON-LINE SYSTEMS; NASA PROGRAMS; ARCHITECTURE (COMPUTERS); DECISION MAKING; OBJECT-ORIENTED PROGRAMMING; RELATIONAL DATA BASES; RESEARCH AND DEVELOPMENT
|Measured Spacecraft Dynamic Effects on Atmospheric Science Instruments - Woodard, Stanley E.|
On September 1991, NASA launched the Upper Atmosphere Research Satellite. In addition to its atmospheric science mission, spacecraft dynamic effects on science measurements were analyzed. The investigation included two in-flight experiments to determine how each on-board instrument, subsystem and environmental disturbance contributed to the spacecraft dynamic response and how these disturbances affected science measurements...
Keywords: MULTIDISCIPLINARY DESIGN OPTIMIZATION; AEROSPACE SYSTEMS; ARCHITECTURE (COMPUTERS); COMPUTER SYSTEMS DESIGN; GRAPHICAL USER INTERFACE; OBJECT-ORIENTED PROGRAMMING; GENETIC ALGORITHMS; CIVIL AVIATION; DECISION MAKING
|Optimization of Maneuver Execution for Landsat-7 Routine Operations - Cox, E. Lucien, Jr|
Multiple mission constraints were satisfied during a lengthy, strategic ascent phase. Once routine operations begin, the ongoing concern of maintaining mission requirements becomes an immediate priority. The Landsat-7 mission has tight longitude control box and Earth imaging that requires sub-satellite descending nodal equator crossing times to occur in a narrow 30minute range fifteen (15) times daily...
Keywords: INTERNET RESOURCES; DOCUMENT MARKUP LANGUAGES; INFORMATION SYSTEMS; ON-LINE SYSTEMS; CLIENT SERVER SYSTEMS; INFORMATION RETRIEVAL; WIND TUNNEL TESTS; JAVA (PROGRAMMING LANGUAGE); OBJECT-ORIENTED PROGRAMMING; APPLICATIONS PROGRAMS (COMPUTERS)
|Aerospace Safety Advisory Panel - NON|
This Annual Report of the Aerospace Safety Advisory Panel (ASAP) presents results of activities during calendar year 2001. The year was marked by significant achievements in the Space Shuttle and International Space Station (ISS) programs and encouraging accomplishments by the Aerospace Technology Enterprise. Unfortunately, there were also disquieting mishaps with the X-43, a LearJet, and a wind tunnel...
Keywords: MARS MISSIONS; ROVING VEHICLES; FAILURE ANALYSIS; SOFTWARE ENGINEERING; MATHEMATICAL MODELS; AUTONOMY; SOFTWARE DEVELOPMENT TOOLS; NASA SPACE PROGRAMS; OBJECT-ORIENTED PROGRAMMING; MARS (PLANET); SOFTWARE RELIABILITY
|Numerical Simulation of the Combustion of Fuel Droplets: Finite Rate Kinetics and Flame Zone Grid Adaptation (CEFD) - Gogos, George|
The NASA Nebraska Space Grant (NSGC) & EPSCoR programs have continued their effort to support outstanding research endeavors by funding the Numerical Simulation of the Combustion of Fuel Droplets study at the University of Nebraska at Lincoln (UNL). This team of researchers has developed a transient numerical model to study the combustion of suspended and moving droplets. The engines that propel missiles, jets, and many other devices are dependent upon combustion...
Keywords: DATA BASE MANAGEMENT SYSTEMS; DATA RECORDING; RELATIONAL DATA BASES; DATA INTEGRATION; OBJECT-ORIENTED PROGRAMMING; MATHEMATICAL MODELS; DOCUMENT MARKUP LANGUAGES; PROTOTYPES; ARCHITECTURE (COMPUTERS); APPLICATION PROGRAMMING INTERFACE
|The vision of Ames Research Center - NON|
Ames Research Center, a vital field installation of the National Aeronautics and Space Administration, has a long tradition of award-winning advances in aeronautical, space, and life science research. The center has completed the first step of a comprehensive strategic planning program to ensure its continued effectiveness as a national research laboratory in support of the nation's aeronautical and space goals...
Keywords: ADA (PROGRAMMING LANGUAGE); COMPUTERIZED SIMULATION; PROJECT MANAGEMENT; APPLICATIONS PROGRAMS (COMPUTERS); CONTROL SIMULATION; FORTRAN; GAMMA RAY OBSERVATORY; OBJECT-ORIENTED PROGRAMMING; SATELLITE ATTITUDE CONTROL; SIMULATORS; SOFTWARE ENGINEERING
|Modeling dynamically coupled fluid-duct systems with finite line elements - Saxon, J. B|
Structural analysis of piping systems, especially dynamic analysis, typically considers the duct structure and the contained fluid column separately. Coupling of these two systems, however, forms a new dynamic system with characteristics not necessarily described by the superposition of the two component system's characteristics. Methods for modeling the two coupled components simultaneously using finite line elements are presented...
Keywords: ARTIFICIAL SATELLITES; COMPUTERIZED SIMULATION; OBJECT-ORIENTED PROGRAMMING; REAL TIME OPERATION; SIMULATORS; COMPUTER INFORMATION SECURITY; COMPUTER PROGRAMS; GROUND BASED CONTROL; SOFTWARE REUSE
|SSF growth concepts and configurations - Cirillo, William M|
There are three primary objectives for the Space Station Freedom (SSF) Growth concepts and configuration study task. The first objective is the development of evolutionary SSF concept consistent with user requirements and program constraints. The second primary objective is to ensure the feasibility of the proposed SSF evolution concepts as the systems level. This includes an assessment of SSF evolution flight control analysis, logistics assessment, maintainability, and operational consideration...
Keywords: ARTIFICIAL INTELLIGENCE; SEMANTICS; DATA STRUCTURES; EXPERT SYSTEMS; KNOWLEDGE REPRESENTATION; MESSAGE PROCESSING; OBJECT-ORIENTED PROGRAMMING; APPLICATIONS PROGRAMS (COMPUTERS); C (PROGRAMMING LANGUAGE); INFERENCE
|Data catalog series for space science and applications flight missions. Volume 3B: Descriptions of data sets from low- and medium-altitude scientific spacecraft and investigations - NON|
The main purpose of the data catalog series is to provide descriptive references to data generated by space science flight missions. The data sets described include all of the actual holdings of the Space Science Data Center (NSSDC), all data sets for which direct contact information is available, and some data collections held and serviced by foreign investigators, NASA and other U.S. government agencies...
Keywords: ARTIFICIAL INTELLIGENCE; FAULT TREES; INFERENCE; PROTOTYPES; STRUCTURAL ANALYSIS; COMPUTER PROGRAMS; EXPERT SYSTEMS; FAIL-SAFE SYSTEMS; FAILURE MODES; FLIGHT CONTROL; KNOWLEDGE BASES (ARTIFICIAL INTELLIGENCE); OBJECT-ORIENTED PROGRAMMING; CIRCUITS
|Did the Eruption of the Mt. Pinatubo Volcano Affect Cirrus Properties - Luo, Zhengzhao|
Some observations suggest that the volcanic aerosols produced by the Mt. Pinatubo eruption may have altered cirrus properties. We look for evidence that such modification of cirrus is extensive enough to be climatically significant by comparing three satellite-based cirrus datasets produced by the ISCCP (International Satellite Cloud Climatology Project) analysis, the 'split-window' analysis, and 3I analysis...
Keywords: COMPUTATIONAL FLUID DYNAMICS; FLUID FLOW; DESIGN ANALYSIS; APPLICATIONS PROGRAMS (COMPUTERS); JAVA (PROGRAMMING LANGUAGE); FORTRAN; UNSTRUCTURED GRIDS (MATHEMATICS); COMPUTER PROGRAMMING; OBJECT-ORIENTED PROGRAMMING; SOFTWARE ENGINEERING; FINITE VOLUME METHOD